The question is not very specific. Does VB include VBA? Does said
building mean using cells and formulas without using VBA? What sort of
financial models? Do the models include intermediate calculations that
use a lot of cells? Are worksheet formulas being changed regularly to
improve the model? If the answer to either of the last two questions
is 'yes', it might be more efficient to use some VBA (or even VB).

Hth,
Merjet